Free Rice

I'm always looking for educational internet-based games. I'd forgotten about "Free Rice". How could I? It's educational and it's linked through a program that gives out... you guessed it! Free Rice! I'm going to let my son (age 9) play it this afternoon. In addition, I've played it a little this morning and am disappointed by my performance. However, I LOVE seeing those grains of rice accumulate! The vocabulary is my favorite, but they've also got Art, Chemistry, Grammar, Geography, Foreign Languages and Math. Have fun!
http://freerice.com/index.php